condition mean min max ZT0-3 0.4544015 0.0 1.14887 ZT4-7 0.0 0.0 0.0 ZT8-11 0.3673785 0.3673785 0.3673785 ZT12-15 0.606934 0.3981835 0.8156844999999999 ZT16-19 0.2002865 0.2002865 0.2002865 ZT20-23 1.4262 1.4262 1.4262